21101214122179 has 2 divisors, whose sum is σ = 21101214122180. Its totient is φ = 21101214122178.

The previous prime is 21101214122137. The next prime is 21101214122257. The reversal of 21101214122179 is 97122141210112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101214122179 is a prime.

It is a super-2 number, since 2×21101214122179² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101214122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550607061089 + 10550607061090.

It is an arithmetic number, because the mean of its divisors is an integer number (10550607061090).

Almost surely, 2^{21101214122179} is an apocalyptic number.

21101214122179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101214122179 is an equidigital number, since it uses as much as digits as its factorization.

21101214122179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 21101214122179 in words is "twenty-one trillion, one hundred one billion, two hundred fourteen million, one hundred twenty-two thousand, one hundred seventy-nine".